Pattern and chaplet therefor for producing molds.



J. A. FIELD.

PATTERN AND GHAPLET THEREFOR P 0R PRODUCING MOLDS.

APPLIUATION FILED NOV. 10. 1910. RENEWED MAY 7, 1913.

1,081,376, Patented Dec. 16,1913.

fig. L 4 a Fig. 2.

Witnesses. 8W1, CL. 33% Inventor.

JESSE A. FIELD, OF DUNKIRK, NEW YORK.

PATTERN AND CHAPLET THEREFOR FOR PRODUCING MOLDS.

Application filed November 10, 1910, Serial No. 591,615.

Specification of Letters Eatent.

Patented Dec. 16, 1913. Renewed May 7, 1913. Serial No. 766,206.

Be it known that 1, Jesse A. FIELD, a citizen of the United States, residing at Dunkirk, in the county of Chautauqua and State of New York, have invented new and useful Improvements in Patterns and Chaplets Thorofor for Producing Molds, of which the following is a specification.

This invention relates to improvements .in patterns and chaplets utilized in preparing molds for metal castings.

The principal object of the invention is to movably mount the chaplets in the mold forming face of the pattern so that they will be forced toward said mold forming face by the pressure of the sand immediately above the chaplets, and thus compress the sand immediately beneath the chaplets to substantially the same degree of condensation as the remaining portions of sand in the mold.

The invention also relates to certain details of construction of the pattern, the chaplet, and the means for yieldingly maintaining the chaplet in an elevated position, which will be fully and clearly hereinafter described, reference being bad to the accompanying drawings, in which,

Figure 1 represents a top plan view of a pattern provided with the improved ch aplet. Fig. 2 is a transverse vertical section through the pattern, on line (a (1, hi g. 1, illustrating one of the chaplcts in its normally elevated position. Fig. 8 is a. transverse vertical section through the pattern on line a (a l, illustratlng one of the chaplets in its depressed position.

In referring to the drawings in detail like numerals designate like parts.

The arrangement of chaplcts in openings in the surface of the pattern so that they may be moved downward toward the top surface of the pattern by the pressure of the molding sand above, and thus compress the molding sand located beneath to substantially the same state of condensation as the remainder of the molding sand lying against or in proximity to the surface of the PfLtllQlZl is the principal feature of this invention, and While in the accompanying drawings a pattern of the size and form used in producing molds for casting radiator sections is illustrated, it should be u11- derstood that the improved chaplet is equally adapted to be utilized with other forms of castings used in producing various other devices and articles.

The adaptation shown in the drawings consists of a pattern 1 constructed of metal and provided with a series of openings 2 which extend approximately vertically through the top wall of the pattern and are relatively small in. diameter. The pattern is mounted on a supporting bed or plate 3. and a flask 4L of conventional form for con taining molding sand. is arranged on the pattern as shown in the accompanying drawing.

The preferable form of chaplet consists of a thin flat plate-like top head of substantially square form and a depending stem 6. A series of chaplets are preferably employed which are equal in number to the vertical openings 2 in the pattern, the stems of the chaplets being slidably fitted through said openings 2, and the heads 5 being arranged substantially horizontally above the top of the mold forming surface of the pattern, as shown in the accompanying drawings. To maintain the chaplets normally in. an elevated position, springs are arranged within the hollow of the pattern and press upward against the stems of the chaplets. While the springs employed in connection with these chaplets may be of any suitable form, the flat form of spring is preferred, for the reason that it is more compact, stronger and better adapted for the pur pose. The spring 7 which, as before de scribed, is of an approximately flat form, has one end bent slightly and secured to the pattern by a screw 8 and the opposite end projected beneath the stem of the chaplot, as shown in Figs. 2 and 3.

The bottom of the pattern within the hollow thereof is provided with raised projections or stumps 9 which are located vertically beneath the lower ends of the chaplet stems and the outer or free ends of the springs 7, and serve to limit or stop the downward movement of the free ends of the springs and the chaplets.

The operation of this improved device when utilized in the production of a sand n'iold is as follows :The flask being placed in position on the pattern the molding sand is poured in and compressed in the Well known way. While the sand is being compressed in the flask, the tension of the sprlng 7 maintains the chaplet in its 1 lifted position until the pressure of sand above the chaplet becomes sutliciently strong to force the chaplet down against the tension of said spring. Upon the pressure above the chaplet becoming greater than the tension of the spring the chaplet descends and compresses that portion of the molding sand located immediately beneath its flat head against the mold forming surface of the pattern. By this means the molding sand immediately beneath the chaplet is compressed near the latter end of the compressing action against the molding sand in the flash to substantially the same degree of condensation as the remaining portions of the molding sand.

The parts or elements of this improved apparatus may be rearranged, modified or changed, or some may be altogether omitted within the scope of the following claims without departing from my invention. For instance, while the chaplets are shown as mounted on fiat springs, spiral or other forms of springs may be utilized in lieu of the fiat springs, or the springs may be altogether omitted and other means employed to movably maintain the chaplets in an elevated posit-ion.

claim.

1. In a device of the class described, a pattern and a spring tensioned chaplet movably mounted in said pattern.

2. In a device of the class described, a pattern, and a spring tensioned chap-let movably mounted in the top surface of said pattern.

3. In a device of the class described, a pattern provided with an opening in the top surface thereof and a spring tensioned chaplet movably mounted in said opening.

In a device of the class described, a hollow pattern having or enings, chaplets movably mounted in said openings and springs arranged within the hollow of the pattern for yieldingly maintaining said chaplets normally in an elevated position.

In a device of the class described, a

pattern having openings, chaplets having stems movably fitted through the openings in the pattern and springs beneath the stems of said chaplets.

In a device of the class described, a

pattern having openings, chaplets having stems movably fitted through the openings in the pattern and stems of said chaplets.

'7. In a device of the class described, a pattern; said pattern being hollow and having openings through its top wall, chaplet-s having stems openings in the pattern and flat springs located within the hollow of said pattern and extending beneath the stems of said chaplets.

8. In a device of the class pattern; said pattern being hollow and having an opening through its top wall, a chaplet having a stem fitted through the opening in the pattern, a flat spring located within the hollow of said pattern and hav- 70 ing its free end extending beneath the stem of said chaplet and a screw for fastening the opposite end of said spring to the pattern.

9. In a device of the class described, a 75 hollow pattern, a chaplet movably supported on the top of said pattern, and means located within the hollow of said pattern for yieldingly tensioning said chaplet.

JESSE A. FIELD.

Viitnesses A. J. SANGSTER, F. L. MnsMn'r.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

flat springs beneath the movably fitted through the described, a 

